The water resistance of PVA was increased by using urea. The product was tested by the method of solvent extraction. The best modification condition was found.
用尿素对聚乙烯醇基料进行了改性，使其耐水性得到提高。并用溶剂萃取法对其耐水性进行了测试，确定了最佳改性条件。
The water resistance of PVA was increased by using urea. The product was tested by the method of solvent extraction. The best modification condition was found.
用尿素对聚乙烯醇基料进行了改性，使其耐水性得到提高。并用溶剂萃取法对其耐水性进行了测试，确定了最佳改性条件。
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